



<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form action="" enctype="multipart/form-data" method="post">
    <input type="hidden"name='MAX_FILE_SIZE' value='2'>
    <input type="file" name='image'>
    <input type="submit" value='上传' name='sub'>
    </form>
</body>
</html>



<?php
echo uniqid('good');
// var_dump($_FILES);
// move_uploaded_file($_FILES['image']['tmp_name'],'./upload/'.$_FILES['image']['name']);
// var_dump($_POST);
// if(!empty($_GET['image'])){
//     var_dump($_FILES);
// }

if(!empty($_POST)){
    if($_FILES['image']['error']==0){
        // move_uploaded_file($_FILES['image']['tmp_name'],'./upload/'.time().rand(100,10000).$_FILES['image']['name']);
        $name=uniqid('user').rand(100,500).$_FILES['image']['name'];
        move_uploaded_file($_FILES['image']['tmp_name'],'./upload/'.$path);
    }else{
        echo "上传失败"+$_FILES['image']['error'];
    }
}
//解决上传的同名文件要给覆盖
//1.通过时间戳
//2.通过uniqid（）实现



?>